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Spanking has kind of gone out of use. Robert still gets the belt from time to time, but you've found that he usually responds well to minor corrections, and hasn't been in major trouble in a while. Your cousin is a school teacher, and he's had success with a paddle. Greg's parents mostly ground these days. It's been a couple of years since you've used CP with either of the other boys.
Today is the birthday for one of your young nieces. She wanted to go to the zoo. The entire family was invited. The three boys were reluctant to go, but quit fussing when you agreed to leave early with them and park several miles away, so they could hike the nature trail. The other two fathers weren't able to get free, so you agreed to take all three of them.
The day started off good, but as soon as you arrived at the zoo, the three teens turned into monsters. They weren't out and out rude or disobedient, but they were teasing the other kids, staying on the outskirts of the group (making the rest of you wait on them or getting ahead and complaining about having to wait), and they were making little comments to each other - quiet enough that you couldn't hear what was said, but it seemed obvious they wanted you to think they were saying something bad.
You finally have enough and tell all three of them that they're grounded for a week - completely. That week is going to eat into their Spring Break, but you really don't care.
The three change their attitude, and they apologize to you and the other adults, and they start being friendlier and more helpful to the younger kids.
It's time to go, and you're really not looking forward to the hike back with them. The other cars are all full, and you're wondering if it's worth getting someone to run you back to your car then come back, when the boys come up to you.
"We're really sorry," Robert says, the other boys behind him, nodding, having obviously selected him to be their spokesperson. "We know we screwed up, Dad, but please don't ground us like that. It'll ruin vacation."
"That's too bad," you respond. "You should have thought of that sooner."
"Yeah, but... Look, we know we deserve to be punished, but couldn't you just whip us. You've got your big belt on, and there's plenty of private spots on the trail. You could do it, then you wouldn't have to tell their dads you were gonna ground us..."